Problem: Equilin is an estrogen that is commonly used in hormone replacement therapy. A sample of equilin is sent for elemental analysis and is determined to contain 80.546% carbon, 7.510% hydrogen, and 11.943% oxygen. If the molar mass of equilin is 268.34 g/mol, what is the molecular formula for equilin? a. C20H20O2 b. C18H20O2 c. C9H20O d. C27H30O3

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Equilin is an estrogen that is commonly used in hormone replacement therapy. A sample of equilin is sent for elemental analysis and is determined to contain 80.546% carbon, 7.510% hydrogen, and 11.943% oxygen. If the molar mass of equilin is 268.34 g/mol, what is the molecular formula for equilin?

a. C20H20O2

b. C18H20O2

c. C9H20O

d. C27H30O3

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